So I got a CompLyfe Battle Deck today and it whistles like a mofo.  Kind of fun though but it's the first one I got with a built in whistle. 
So I was wondering is this a normal thing with RDA's? I know the Petri also sometimes whistles.
		
		
	
	
		
	
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			So I was wondering is this a normal thing with RDA's? I know the Petri also sometimes whistles.
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